基于CABAC的視覺(jué)質(zhì)量可控的H.264視頻感知加密算法

柏森; 郭雨; 趙波; 代勤芳

doi:10.11999/JEIT151478

基于CABAC的視覺(jué)質(zhì)量可控的H.264視頻感知加密算法

doi: 10.11999/JEIT151478

1.
(重慶通信學(xué)院重慶 400035) ②(77108部隊(duì) 崇州 611230) ③(78088部隊(duì) 重慶 400039)

基金項(xiàng)目:

國(guó)家自然科學(xué)基金(61272043)，重慶市基礎(chǔ)與前沿研究計(jì)劃項(xiàng)目(cstc2013jjB40009)，重慶市科技研發(fā)基地能力提升項(xiàng)目(cstc2014pt-sy40003)

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出版歷程
- 收稿日期: 2015-12-29
- 修回日期: 2016-05-30
- 刊出日期: 2016-10-19

CABAC Based H.264 Video Perceptual Encryption Algorithm with Adjustable Visual Quality

1.
(Chongqing Communication Institute, Chongqing 400035, China)

Funds:

The National Natural Science Foundation of China (61272043), Basic Frontier Project of Chongqing (cstc2013 jjB40009), Chongqing Enhancement Project on Research Development Base (cstc2014pt-sy40003)

摘要

摘要: 在視頻點(diǎn)播等應(yīng)用中，為了刺激消費(fèi)者購(gòu)買高質(zhì)量的視頻，需要對(duì)視頻進(jìn)行特別的感知加密，使視頻加密后仍然部分可見(jiàn)。該文提出一種Context-based Adaptive Binary Arithmetic Coding (CABAC)的視覺(jué)質(zhì)量可控的快速感知加密算法。利用2D超混沌系統(tǒng)生成的流密碼對(duì)重要的語(yǔ)法元素和敏感的編碼元素異或加密。加密內(nèi)容包括運(yùn)動(dòng)矢量差的符號(hào)位、非零系數(shù)符號(hào)位和語(yǔ)法元素significant_coeff_flag。分析及實(shí)驗(yàn)結(jié)果表明，提出的感知加密算法對(duì)碼率無(wú)影響，編碼時(shí)間僅增加7左右，視頻質(zhì)量隨著質(zhì)量因子的改變而變化，滿足視頻感知加密的應(yīng)用需求。
- 視頻加密 /
- 感知加密 /
- H.264/AVC /
- 質(zhì)量控制
Abstract: In Video on Demand (VoD) applications it is desired that the encrypted multimedia data are still partially perceptible after encryption in order to stimulate the purchase of the high-quality versions of the multimedia products. This perceptual encryption requires specific algorithms for encrypting the video data. In this paper, a Context-based Adaptive Binary Arithmetic Coding (CABAC) video perceptual encryption scheme is designed. The video quality of this encryption scheme is controllable. The important syntax elements and sensitive coded elements are chosen to encrypt using mathematical XOR operations with stream ciphers generated by 2D hyper chaos system. The encryption scheme is composed of encrypting Motion Vector Differences (MVD) sign, non-zero coefficients sign and significant_coeff_flag. Theoretical analysis and experimental results show that the proposed scheme has no impact on bit rate. With the 7 encoding time increasing, the video quality can be controlled by the change of the quality factor, which meets the requirement of the video perceptual encryption.
- Video encryption /
- Perceptual encryption /
- H.264/AVC /
- Quality control

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